What Is Solar Control Window Film?
Solar Control Window Film is a specialist polyester-based film applied to existing glazing to reduce heat, glare, and ultraviolet (UV) radiation entering a building. Unlike blinds or curtains, it works by selectively filtering parts of the Solar spectrum while still allowing natural light to pass through.
In simple terms, Solar Control Window Film is designed to make your glass perform better — without replacing the window itself.
Professional Window Film Installation allows homeowners and commercial property owners to improve comfort, reduce Solar gain, and protect interiors without structural alterations.
Understanding the Solar Spectrum
To understand how Solar Control Window Film works, it helps to look at what sunlight actually is.
Sunlight is made up of three main components:
- Ultraviolet (UV) rays – Great for giving you a tan (or skin damage), and just as effective at damaging precious surfaces.
- Visible light – The natural daylight we see.
- Infrared (IR) radiation – Heat energy itself.
When sunlight hits untreated glass, much of this energy passes directly into your space. Standard double glazing reduces some heat and UV, but it does not eliminate it entirely.
Solar Control Window Film works by targeting these elements individually.
How Solar Control Window Film Reduces Heat
The primary job of Solar Control Window Film is to reduce Solar heat gain.
It does this in three ways:
1. Reflection
Reflective Films bounce a portion of infrared and visible light away. This is why Reflective Films often have a mirrored appearance from the outside.
2. Absorption
Many Solar Control Films absorb heat into the metallised layer. Films with high absorption rates, such as dark neutral and Reflective Films, should only be installed on the correct type of glass. Read more about thermal stress here.
3. Selective Filtering
Advanced Films, such as Spectrally Selective Films, are engineered to block specific infrared rays responsible for heat while allowing visible light to pass through. Total Solar Energy Rejected values can often only reach around 47% for these Films, as infrared makes up roughly half of what heats up your home.
This is why, in some cases, choosing a darker Solar Film like our Silver 20 can be the only effective way to reduce heat to a comfortable level. If you would like to read more about the Solar Films we offer, click here.
If Infrared Is Heat, Why Does Visible Light Matter?
If you’ve made it this far — congratulations, because I’m nearly falling asleep writing it — you’ve probably realised that infrared is essentially heat. So what’s the point in blocking visible light if your home gets hot during sunnier months?
When visible light hits any surface, it is absorbed (especially by darker colours) and converted into infrared radiation.
This essentially turns your house into a radiator during the summer, with surfaces giving off heat left, right, and centre.
UV Protection: Preserving Your Interior
Solar Control Window Film can block up to 99% of UV radiation.
UV rays are the primary cause of:
- Fading furniture
- Discoloured flooring
- Damaged artwork
- Brittle plastics
Even on cloudy days, UV radiation passes through untreated windows. Installing UV Protection Window Film helps preserve interior finishes and extend their lifespan.
Unlike blinds or curtains, Window Film protects your space continuously — even when open.
Glare Reduction Without Losing Natural Light
Glare occurs when excessive visible light creates discomfort or impairs visibility — particularly on screens and televisions. Essentially, it comes down to how bright the day is.
Solar Control Window Film reduces glare by controlling light transmission levels. This means:
- Less eye strain
- Improved screen visibility
- More comfortable living and working environments
Importantly, modern Films are designed to balance glare reduction with natural daylight, so your room doesn’t feel dark or enclosed.
Even with darker Films, customers are often surprised at how much light still passes through their glass, so once the Window Film is installed, the difference isn’t as drastic as they expected.
This is a quick video of how our Silver 20 Window Film looks from the inside:
Thermal Performance and Energy Efficiency
In certain cases, specialist Films such as Low-E Window Film can also improve insulation performance, contributing to better internal heat retention during colder months — similar to what a Low-E coating would achieve.
Although Window Film Installation is not a substitute for full window replacement, it is often a far more cost-effective performance upgrade, particularly for customers with older glazing that may lack modern thermal technology.
So not only are you improving the comfort of your home, but you could also potentially reduce your energy bills — making Low-E Films a worthwhile investment.
Why Professional Window Film Installation Counts
We only use the best Films from an array of cherry-picked suppliers. We will always recommend the best Window Film solution for your specific needs.
Self-installation Window Film may get you part of the way there, but not only does it take time to install, our Films offer more choice in terms of aesthetics, performance, thickness, quality, and warranty coverage.
The performance of Solar Control Window Film depends not only on the product but also on the quality of installation itself.
Professional Window Film Installation ensures:
- Correct Film selection for your glass type
- Proper adhesion and curing
- Long-term durability
- An installation guarantee
Poorly installed Window Film can result in bubbling, premature failure, or reduced performance. So if you value your time, money, and how your home looks, you’ve come to the right place.
Is Solar Control Window Film Scientifically Proven?
Yes. Solar Control Window Film is laboratory tested for:
- Solar Energy Rejection
- Visible Light Transmission
- UV Filtration
- Glare Reduction
- Thermal Performance
These aren’t hypothetical figures — they are real, proven results.
Manufacturers publish performance data based on standardised testing methods. These metrics allow accurate comparison between Film types and help ensure predictable results.
Considering Solar Control Window Film?
If you’re experiencing excessive heat, glare, or fading, Professional Window Film Installation could provide a long-term solution.
We understand that most customers start with cost, which is why we often provide a free online quote first, then discuss your options from there.
If this sounds good to you, please get in touch.